Aliens from the planet Kuuru have kidnapped a number of humans for experimental purposes leading to an impending invasion of the planet Earth. The Terrestial Defense Force is sent to investigate and meets a mysterious wanderer named Dan Moroboshi who helps destroy the invading alien forces. No one knows his true identity, but Moroboshi transforms into Ultraseven, a silver and red dressed superhero from another galaxy committed to protecting the Earth from monsters and alien threats.

A strange metallic rock lands outside the home of Agent Ishuguro, one of the Ultra Garrison members.

An unidentified object has landed somewhere near the Kiso Mountains. Dan and Furuhashi are sent to find any wreckage, or signs of life. They find a young girl swimming in Lake Azuma as well as a spaceship nearby.

Three members of the Ultra Garrison are sent to a secret meeting with Commander Takenaka aboard the Max, one of the elite vessels in the Ultra Guard. This secret mission is to learn of the origin of several oceanic disappearances.

A supersonic jet leaves the Ultra Guard Science Center in Antarctica with renowned scientist, Dr. Yushima. aboard. Heading for Japan to the Ultra Garrison command center, the jet inexplicably freezes in the air; momentarily caught in some bizarre beam.

Upon returning from investigating a mysterious light source, Dan is called to agent Anne Yuri's quarters after a strange shadow like figure appears there.

Aboard Space Station V3, agent Mizuno receives multiple transmissions from an alien source, but has been unable to decipher them. Meanwhile, two hunters find a small, single passenger alien spacecraft in the woods and are attacked by the fish-eyed, gas drinking alien traveling inside.

In the town of Kitagawa, a string of perplexingly fatal accidents have claimed the lives of hundreds of people.

Furuhashi and Moroboshi are on patrol one evening. They stop for a woman who asks to speak with Dan. Furuhashi pretends to be Dan and the mysterious woman ends up severely shocking Furuhashi.

Akira, a young boy with a broken leg, spies peculiar goings on at his neighbors house. He tries to tell his mother, but she doesn't believe him. With recurring strange phenomena, the Ultra Guard get involved.

The Ultra Guard seek answers into the deaths of over two dozen people at Mt. Iwami. While there, Dan is apparently killed by an assassin using an unusual rifle.

A number of young ladies have fallen ill and all seem to be wearing peculiar looking metallic watches.

Captain Kurata, aboard the V3 space station, reports that they are under attack from an enemy ship. Kurata manages to escape during the skirmish, although the chase leads Alien Iyros to Earth.

An Anglo assassin has been snuffing out various foreigners in Japan. It's learned that all the victims were secretly part of the Washington Terrestial Defense Force Scientific Team.

After the Pedan's robot monster King Joe retreats, Captain Kiriyama plans to ready the Ultra Guard forces for their next attack.

After going missing for three months while en route to study the planet Annon, Cherry Blossom 9 suddenly reappears and initiates contact with the Terrestrial Defense Force. Landing near Mt. Hades, Moroboshi, Anne and Amagi are sent to investigate.

A cave-in traps Jiro, a miner, 3,000 feet below the Earth's surface. The Ultra Guard is asked to help in learning of the cause of the disruption inside the cave.

On a skydiving exercise, Amagi and Soga disappear, landing in a fog enshrouded forest in what seems like some alternate dimension.

Dr. Miyabe is working on Project Blue, a plan to develop a defense barrier around the Earth to protect from alien threats.

The Ultra Guard have reports of earthquakes in the area, but there's something strange about them. Meanwhile, two female racers on their way to a rally find an unusual rock just as another tremor shakes the ground near Aosawa Mountains.

A cargo ship has gone missing at sea and the Ultra Guard are sent to investigate this newest disappearance.

During a birthday party for a young woman named Ruriko, a alien known as Braco walks out of the ocean, kills her dog and makes off with the girl. Anne, who is attending the party, alerts her comrades.

Captain Kiriyama and Furuhashi find a terrified old man named Yasui being chased by a mysterious driver of a chain-draped dump truck. Later revealed to be a fortune teller, Yasui divulges some information about an impending warehouse explosion where all the Ultra Guard weapons are kept.

An Ultra Squad patrol craft mysteriously crashes into a commercial plane in mid-air.

A monumentally deadly snowstorm engulfs the Earth. The Ultra Garrison headquarters is frozen after a mysterious monster drills underground and breaches the walls of the base.

Two Ultra Guard scientists, Doctors Segawa and Maeno create a new devastating weapon -- the anti-planet device they christen the R-1.